<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>边框和内边距</title>
    <style>
        #d1 {
            width: 200px;
            height: 200px;
            border: 100px inset red;
            /*设置圆角,超过宽高一半时为正圆*/
            border-radius: 200px;
        }

        #d2 {
            width: 300px;
            height: 300px;
            border: 1px solid blue;
            padding-top: 100px;
            padding-left: 100px;
            box-sizing: border-box;

        }
    </style>
</head>
<body>
<div id="d1">边框测试</div>
<div id="d2">内边距测试</div>


</body>
</html>